Socket for incandescent electric lamps.



D, E. BQWN.' i SOCKET P OR INCANDESOBNT ELBCTRIG LAMPS. 'APPLIOATIONFILED Mm. a.' 1906.

921,199. Panamay 11, 1909.

WITNESSES VDevin B oWN, oF PI'TTSB'URG, PENNSYLVANIA.

vsoefrnrr Fon memnsonnr stearato LAMPS.v

4 Speciqation of Letters Patent.

.Patented May 1'1, 190'9.

Application ffled Marcin 1906.* Serial No. iodaet).

To all 'whom it mez/y concern: r

Be it 'known that il, DAvm E. BoWN, a' resident lol Pittsburg, in thecounty of Allegheny and State of Pe-nnsylvan-ia, have in'- ventedla newand useful Improvement-in .Sockets for Incandescent vlillectric Lamps;

'and I -do hereby declare the following to be a full, clear, and exactdescription thereof.-

My invention vrelates to sockets for incandescent electric lamps, andhas for its object to provide'a cheap, simple-and efficient form of asocket, which will be eas?,T to construct and install, will do away withthe objection-aldo screws so commonlyv employed,

and will also fully protect and insulate the various metallic parts.

the novel arrangement, construction and ,combination of parts ashereinafter more fullyl set forth and described and partic-ularlj,vv

pointed out '1n-the claims .To enable others skilledin the art to whichmy invention appertains to construct and usemy improved socket, I Willdescribe the same more'fully, referring to the accompanying drawing, inWhich- Figure 1 is a vertical central section of n y improved socket forincandescent electric lamps double pole form. Fig. 2 is a side elevationof the base or block employed looking at. the rear face of the saine andshowingsoine of the parts in section. Fig. 3 is a like view of saidblocklooking at the front iaceof the same. Fig. 4 is a cross-sec tionofthe block on the line 4 4 Fig. Zand looking in the direction of thearrow 5 is a li'kevievv' on the line 5-.5 Fig.- 1 and lookingin thedirection oi the arrow. Fig. 6 is a perspective view oi the camemployed. Figs. 7 and 8 are side elevations ofthe basel or blo-3k,partlj.T in section, and showing'jt'he same for use with a single polesocket. Fig. 9 is vav sectional View showing. invention- `applied foruse With a keyless socket and showing another. manner of ,attaching the.s'hell tothe blo-ck. g. Like symbols of lreference 'herein indicatelike parts ineach offthe figures of thedrawing.

annular flanges 2, 2 thereon and betweenv which is the partition orcenter Wall 3.- This" Wall'S Tforms the recesses 3 'on each side thereofand has the connecting 'and extending portion 4 projecting out on oneside Aof the same. The lower flange '2' on the-block Ivisconnected tothe threaded metallic shell 5 formi-ng the outer terminal of the lampbj." an annular grooved seat 5 forme-'d in the4 inner end of said shellb v the metal of the said shell being bent over the said flange, as vat5". This shell 5 fits Within an outer'shell or-casing 6 which has alining 7 of -i-nsulz'iting. material Within the same, while to the upperend of said casing 6is attached the metallic cap 8 having the .usual'threaded attachment nipple 9 formed on the curved end 1'0 thereof.

i The cap 8 has an annular seat 10 formed My invention consists,generalljstated, 1n

therein for the upper i'l'ange 2 of the blockl y means of the curve-dend 1'0 and annular rib 10 on said cap, and suoli cap is connected tothe outer easing 6 by means of the innerend of said spindle abuts theshoulder 12 formed on said cam-bar and adjacent to said end 12 Thecam-bar v12 lits Within an opening 3 formed m the center Wall 3 andextension 4 'ot the block'l and its opposite end is pro`A Avided with acam 13 `formed of porcelain or other insulating material, which issecured thereto by means oia nut 14 engaging with such threaded oppositeend 14 and fitting Within a seatv 14 formed in the face 'of said cam.

' Extending through the center wall 3 ofthe vblock 1, arethe terminals15, 15 to which the Wires 16, 16 are connected on one side of said ThisWall, suoli terminals being located on each side of the extendingportion 4 in said center Wall, so that the Wires in passing through thenip le 9 of the cap 8 and through holes 16 in t e upper flange 2 of saidblock to said ter- `minals will beseparated by said portion 4.

A spring contact point 17 'extends u in front of one of the terminals 15and'on t e opposite side of the Wall 3 from the Wires 16 and thiscontact point is connected to the bent edge 5 onthe shell 5 fitting overthe lower block flange 2, while-another spring contact point 17 extendsu in front ofthe other ter-A minaland on t e same side of the wall 3 asthe contact point 17.y This contact point,

17 is connected to a central lamp terminal 18 located on the outer face'of the flange 2 on the block 1 by means of a screw' 19 connecting theseparts through said -llange 2 and such lamp terminal 18 is provided witha spring contact'lip or piece'18 thereon. The

ends 13 of the cam 13 are adapted to fit between the free ends of thesprlng contact points 17, 17 and the'terminals 15,15 to make and breakthe circuits, and the op ov site sides of each of said ends are beve eddown, as at 13 in order to facilitate vsudh ends to. be placed betweensuch contact points for working. 'InFigs 7 and 8 my improved socket forincandescent electric lamps is shown in a single oleform in which caseonly the terminal 15 1s used to be engaged by the cam 13 and thespring'contactpoint 17 is done away with. In thls form the terminal 15has a contact plate 19 connected to the same withinf the `wall 3 of theblock 1 lso that it can extend through an opening 19 formed insaidblockv andpbebent or projected into aspring contact 20 along and withina recess 20 formed vin vthe face of the flange 2 'on said block to formthe central lamp terminal. y

In Fig. 9 my invention `is shown as applied to akeyless socket and insuch case the terminals 15, 15 inthe center wall 3 are con# 'nected withthe shell or outer terminal ofthe lamp' and to thecentral lamp terminalby the contact points'l', 1 7 respectively in sub- `s'tantially the samemanner as shown in the single pole socket construction. In such" figure1s also .shown another form of attaching the shell 5 to the block, whichconsists in .forming-a rooved scat 1 in the lower flange 2 'of the b ock1 and rthen bending the inner edge of the shell 5 around the lower edge2a of said flange and'into said seat 1 and therevby form the gilloovedseat 5 in said shell for said edge, w 'le the u per edge 2b of saidflange can be extends slightly beyond. the lower edge in order to bearagainst the insulated lining 7, in the casing 6. In the use of -thisformofjshell attachmentl the contact are. drawn through the nipple 9-of thecap' 8 and arelsecured ,tothe terminalslA and-"'15" respectively, on thewall 3 of the blockl and l on each side ofthe extending ortion 4 on saidwall, by passing through t e holes 16(l inthe flange 2 on said block.The block 1- is permanently iixed or secured to the cap 8V vthrough themedium of the groovedseatl 1 0I formed in said cap fitting around theilan e 2 on said block and is attached to the s he 5' by bending overthe ends of the shell toform the groove 5 for the ilange 2, sothat'withf the'cam-bar 12 and cam'13V in place within the said block the partsare ready for formi ing the complete socket by placing the shell 5within the outer casing 6, as shown in Fig. 1. v

After rthis is accomplishedv the cap 8 isv screwed u on the casinghthrough the medium o the threaded ortion 9 on saidl cap engaging withthrea ed portion 6- on sald casing which will cause these arts andV theblock l and shell 5 to be secure lin place,

thereby enabling the shoulder 5HL formed by "the grooved seat 5 on saidshell to rest against a like shoulder 6u formed on said casing. andalso. enabling the openings 6 and 8 in'said casing and cap res activelyto register with each other and orm the.

hole 8. The spindle 11 on the key or thumb-piece 11, can n'ow beinserted through the hole 8 the casing 6 and -cap and' screwed to, laceagainst the shoulder 12 on the c amar 12 through .the medium of thethreaded end 12 on said bar engaging with the threaded. opening or yseat11 in y" said spindle thereby' forming the complete socket and readyfor.. the lamp (not shown) to be screwed into the shell 5 to contactwith the central lamp terminal therein. It will also be obvious that'theterminals .15 and 15 are connected and disconnected with the Y' wires 16and 16 by means vof the-cam'i en-` gaging and disengaging by itsendsv.13 bev tween the spring contact points v'17 and 17 and'said terminalsin the ,one or. double pole form and by one of -the ends 1.3 engaging j1in,

and disengaging between the spring contact point-1,7 and the terminal 15 in theotheror .single pole form. In eitherjcase or 'useas thefkey orthumb-piece 11 isalways tujrnedfA in one direction, as toy the right,theicainl y will be turned to' connect-.fand disconnect with theterminal through'the medium of the spindlenlll on said thumbs-'piece'beingJre-y. volvedin the hole-8 and being connected t'A` the barm12 onsaid cam, and when'said thumbl piece 1s turned in the-oppositedirection' it will act to unscrew 'the'sanie'frornsaid bar.

In case of such lreverse tuiningof :the s indle ,1'1 through ignoranceor mrstakeit w' vvsoon.

burn or the removal-of. the fkeyjfro'fn the socket and causeflthespindlefto 'bejturne'd in the (proper "direction, although`whe'njcsuchspin le 1s removed from the Yhole Sthe parts "are ready'.toghe disconnected for any cause "by v'the `unscrwing of; the'eapfromthe order. to vovercome :the

cames shell or ca sing nand the removal of the said block 1. and shellv5 from said casing.

ca 4 will thus be seen that my improved socket for incandescent electriclamps can be easily rapid removal of the parts for the purpose ofrepairing or examination of the same. socket 1s also of such'aconstruction that all the vital or important parts are exposed to theeye upon a single 'blockin order to render them easy of. access forrepairing and other purposes, and all theparts are so arranged as 'to beprotected and away from each other in possibility of anyshort-circuiting The socket is so arranged as to overcomeall liabilityof any iires being caused therefrom in. any manner, thereby renderingthe saine fire-proof and being without connecting screws7 whichareliable to bef come loose and form a s ark rendering the saine capableof great ut' itr and safe in use. By reason of being screwless, Y thesocket avoids play ofthe parts and loss of parts and screws, while thesainel is easyand economical to manufacture.

The socket is also capable of'- standing exceedingly highl voltage, andparticularly. in the single pole form, by reason of the terminals beinginsulated by the construction ofthe block' and by reason of betweencentral llamp contactv the distance and shell' lampterminal and beingscrewless.

herein may 4Q.

Various modiiicationsand changes in the construction and design of thevarious parte of my improved socket for incandescent, electricberesorted to without departing iroml'the spirit of the invention orsacrificing anyof'its advantages.

vgether to permit said --the 4same for forming the same for theterminals and a projectingl What I claimas my invention 4and desire t'osecure by Letters Patent is- 1. Ina lamp-socket, the combinationof theinner shell, a cap, and a single solid base or block 'formed ofinsulating material within said shell and cap having a partition Withinrecesses on each side of portion on the side of said partitionforseparatingthe connecting wires leading lto the terminals.v

2. 'In'a'lai'npsocken the combination of insulating material-for theterminals and block and between saidblockland cap. for permanentlysecuring gle so id base or'block formed of insulating material for theterminals and 'connecting wires, and flanges on said block fittingwithin The .connecting wires,

threaded connection.

amps other than. the ones mentioned' -when t e cap' is screwed up',

ing through said ca .or block oflinsulating. materialhavin connectingwires, and connections 'on'said said block and'cap block to be 4carriedby said grooved seat for permanently securing said blocl; to said cap topermit said block to be carried by said cap. 4. In a lamp-socket, thecombination of the inner shell, a single solid' baseer block ofinsulating material for the. terminals landy connecting wires, a ange'onsaid block, and connections between saidshell and {iauge forattaching said shell to said block.

5. In a vlamp-socket', the combination of theA inner shell, a singlesolid base or block of insulating .material for the terminals and aflange on said block, and a bent iiaiige on saidsh'ellfor fitting'overthe block flange to attach said 'shellt'o saidj block.

5. In a' lamp-socket, the lcombination of the cap, an inner sli'ell,asingle solid base or block of insulating material permanently securedwithin and carriedv by saidcap for the terminals and connecting'wires,and an outer casing having a threaded connection' th ereon for attachingsaid cap and block thereto.

7. In a lam s ock et, v'the combination" of the cap, a sing latingmaterial permanentl secured within and carried by said cap. for t eterminalsand connecting wires, and an outer casing engaging with saidcap by a threaded connection.

8. In a lamp-socket, the comlrl ination of the cap, asinglesolid baseor'block ofinsulat:

ing material ermanently securedwithin and carried by said cap for theterminals and connecting wires, an outer casing, anda ca fitting overand engaging with said casing y a 9. In a lamp-socket, the combinationof a, base or block of insulating material for the terminals andconnecting wires, an outer cas# ing having an opening therein, and a cahaving an opening therein and engaging wit said casing by a threadedconnection and said o enings registering with each other to forrn a holefor the reception of the key. L

10. In a lamp-socket, the combination of the outer casing, a cap, asingle or solid base or block of insulating material'havinga partitionorwallwithin the'blockfor forming recesses on each side of thesarne forthe ter- 7 y ,115

minals and connecting wires, and a key pass# and casing and-Journaled'withinsaid Wa l. r

11. Ina lamp-socket, Acoinbination' o the. outer casing, a cap,La singleor solid-base ortioni one side fof-said wall for separatingtheconnectingwiresi and'ahey passin tition or wall n li-thin'said blockforv orming recesses oneach side of thesame for .theterminals andconnectingwires anda projecting throughsaid cap andfcasingand journaleteria'l for the terminalsandconnectingwir-'esj within said-wall an ringcontact points, a key, and a removs a le cam of insulating material onsaid key for fitting between said terminals and contact points inmakingand breaking the circuits.

13. In a lamp-socket, the combination of l the base or block formedof'insulating material for the terminals and connecting wires,

spring contact points, a key, and a revoluble cam of insulating materialon said key having beveled faces'thereon for fitting between saidterminals and contact points in making and breaking circuits.

14. -As a new article of manufacture, a

Vbase or block for incandescent. electric lampsockets.l formed of Iasingle solid piece of insulating material having a iiange 'on the lampend for connecting the same with the inner shell of the socket'.

15. AsA al new article of manufacture,l a

base orblock for incandescent lamp sockets formed of .aisingle'solidpiece of insulating material having :L -flange on the cap end for-coml'ctin -the same with'-, the ca of the socket-an vallflange ontlielamp en for connecting the same 'with the inner shell of the socket.

16. As a new article of manufacture, a base or block for incandescentelectric lampsockets formed of a'single solid piece ofinsulatingmaterial .having a partition or wall therein for forming recesses forthe terminals and a projecting portion on said wall for separating thewires to the terminals:

17. As a new article of manufacture, a

base or block for incandescent'lamp sockets yformed of a single solidpiece of insulating DAVID E. BOWN I Ilritnessesz.'

WALTER FAMAnissr J. N. COOKE.

